[nova] use new objectstore_admin role
[nova] use new objectstore_admin role

swiftoperator role will be removed in the near future as we switched to
distinguishing viewer and admin roles. Viewer role support was added in
Yoga which we rolled out recently.

https://documentation.global.cloud.sap/blog/objectstorage-new-roles

sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts,sapcc/helm-charts